True. I didn't explicitly mention it, but I meant using standard/approved methods, such as generating the legit commands:
With the old master db there, you could get (almost) whatever you needed from the existing master.
You could specify the sid on specific SQL users if you wanted to keep those the same, reducing the need to "re-sync" native SQL users as you restore/attach user dbs.
SQL DBA,SQL Server MVP(07, 08, 09) Prosecutor James Blackburn, in closing argument in the Fatal Vision murders trial:
If in the future, you should cry a tear, cry one for them [the murder victims]. If in the future, you should say a prayer, say one for them. And if in the future, you should light a candle, light one for them.